Winlnet and WinHTTP access agent issues

Today, when writing code, you need to use a proxy for Get and post, which is Web Access. But the problem is that there is a difference between using winlnet and WinHTTP proxy settings.

This really makes me not the solution, let me produce the following several questions:

What is the principle of a winlnet and WinHTTP visit page?

Where is the difference between the two?

What is the difference between a big IP proxy and a three-way place?

Because of the urgency to write the code, solve the problem, there is not so much time and mind to study the above three questions.

Finally, I found a very interesting phenomenon, the refined Web page _ Access agent seems unreliable, and the Web page _ access to the object's proxy access seems very reliable.

Is WinHTTP's proxy way more reliable?

Now also too late to think about these problems, for a moment to remember to use the agent or use WinHTTP way! This is a priority!

Also recommend a good store proxy website: http://www.kuaidaili.com/

As for some of the above questions, wait to have time to ponder and write in the blog!

Winlnet and WinHTTP access agent issues